import java.util.HashMap;
import java.util.List;
import java.util.Map.Entry;

import net.minecraft.src.Item;
import net.minecraft.src.ItemStack;

/**
 *
 * @author Duke605
 *
 */
public class InformationAPI{

    private static HashMap<String, IInformationAPI> modArray = new HashMap<String, IInformationAPI>();

    /**
     * Registers a class for information API method call
     *
     * @param modClass the class you wish to register
     */
    public static void register(IInformationAPI modClass){
        if (modClass != null && !modArray.containsKey(modClass.getClass().getSimpleName()))
            modArray.put(modClass.getClass().getSimpleName(), modClass);
        else if (modClass == null)
            System.out.println("You cannot register NULL.");
        else if (modArray.containsKey(modClass.getClass().getSimpleName()))
            System.err.println(modClass.getClass().getSimpleName() + " is already registered.");
        else
            System.err.println("An impossiable error occured!");
    }

    /**
     * Unregisters a class for information API method call
     *
     * @param modClass the class you wish to unregister
     */
    public static void unregister(IInformationAPI modClass){
        modArray.remove(modClass.getClass().getSimpleName());
    }

    /**
     * Called by GuiContainer, calls all addInformation method from all classes in modArray
     *
     * @param itemstack The item stack
     * @param item Done for convince. Equivalent of "itemstack.getItem()"
     * @param list The information list
     */
    public static void addInfo(ItemStack itemstack, Item item, List list){
        for (Entry<String, IInformationAPI> i: modArray.entrySet()){
            i.getValue().addInformation(itemstack, item, list);
        }
    }
}